:root {
  --surface: var(--color-alabaster);
  --surface-soft: var(--color-white);
  --ink: var(--color-jet-black-soft);
  --line: var(--color-gray-light);
  --brand: var(--color-open-blue);
  --accent: var(--color-light-teal);
}

html,
body {
  background: linear-gradient(180deg, var(--surface) 0%, var(--color-light-grey) 100%);
  color: var(--ink);
}

body {
  font-size: var(--font-size-s);
}

.page {
  min-height: 100svh;
}

.content {
  max-inline-size: 78rem;
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 1rem 1.5rem;
  text-align: left;
}

.site-title {
  margin: 0;
  font-weight: 700;
  font-size: clamp(2rem, 8vw, 4.5rem);
  line-height: 0.92;
  letter-spacing: 0.01em;
}

.lang {
  display: inline-flex;
  gap: 0.8rem;
  margin-bottom: 0.35rem;
}

.lang-btn {
  border: 0;
  background: transparent;
  padding: 0;
  min-inline-size: 0;
  font-size: var(--font-size-xs);
  color: var(--color-gray-mediumdark);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.lang-btn:hover,
.lang-btn:focus-visible {
  color: var(--brand);
}

.lang-btn.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.section {
  border-top: 1px solid var(--line);
  padding: 1.5rem 1rem;
}

.intro {
  min-block-size: calc(100svh - 10.2rem);
  display: flex;
  align-items: stretch;
  border-top: 0;
}

.intro-grid {
  inline-size: 100%;
  display: block;
}

.intro-main {
  display: flex;
  flex-direction: column;
  min-block-size: 100%;
}

h1 {
  margin: 0;
  font-size: clamp(1.4rem, 3.1vw, 2.35rem);
  line-height: 1.14;
  max-inline-size: 28ch;
}

.problem {
  margin-top: 0.8rem;
  max-inline-size: 64ch;
  color: var(--color-gray-mediumdark);
  font-size: var(--font-size-m);
}

.cta-row {
  margin-top: auto;
  padding-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: flex-end;
  align-self: flex-end;
  width: 100%;
}

.btn {
  border: 1px solid transparent;
  padding: 0.6rem 0.95rem;
  font-weight: 600;
  min-inline-size: 10.5rem;
  text-align: center;
  background: var(--surface-soft);
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn-mail {
  background: var(--brand);
  border-color: var(--brand);
  color: var(--color-alabaster);
}

.btn-call {
  background: var(--color-dark-teal);
  border-color: var(--color-dark-teal);
  color: var(--color-alabaster);
}

.btn-mail:hover,
.btn-mail:focus-visible {
  background: var(--surface-soft);
  color: var(--brand);
  border-color: var(--brand);
}

.btn-call:hover,
.btn-call:focus-visible {
  background: var(--surface-soft);
  color: var(--color-dark-teal);
  border-color: var(--color-dark-teal);
}

.staircase-wrap {
  padding-top: 0.35rem;
  padding-bottom: 2rem;
}

.staircase {
  display: grid;
  gap: 1rem;
}

.info-card {
  border: 1px solid var(--line);
  background: var(--surface-soft);
  padding: 1rem;
}

.info-card h2 {
  margin: 0;
  font-size: var(--font-size-l);
}

.info-card ul,
.info-card ol {
  margin: 0.7rem 0 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.45rem;
}

.card-contact p {
  margin-top: 0.6rem;
}

.site-footer {
  padding: 2rem 1rem 1.25rem;
  text-align: center;
  color: var(--color-gray-mediumdark);
  font-size: var(--font-size-xs);
}

.footer-nav {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
  justify-content: center;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
}

.call-modal {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  inline-size: min(92vw, 26rem);
  background: var(--surface-soft);
  border: 1px solid var(--line);
  padding: 1rem;
  z-index: 40;
}

.call-modal h2 {
  margin: 0;
  font-size: var(--font-size-l);
}

.call-number {
  margin: 0.8rem 0 0;
  font-size: var(--font-size-xl);
  letter-spacing: 0.04em;
}

.modal-close {
  margin-top: 0.9rem;
}

@media (min-width: 900px) {
  .section {
    padding: 1.5rem 1.25rem;
  }

  .staircase {
    grid-template-columns: repeat(12, 1fr);
    align-items: start;
  }

  .card-why {
    grid-column: 1 / span 6;
  }

  .card-steps {
    grid-column: 4 / span 6;
  }

  .card-contact {
    grid-column: 7 / span 6;
  }
}

@media (max-width: 899px) {
  .site-header {
    align-items: flex-start;
  }

  .cta-row {
    margin-top: 1rem;
  }

  .btn {
    min-inline-size: 9.5rem;
  }

  .intro {
    min-block-size: calc(100svh - 9.2rem);
  }
}